Not if you want to maintain muscle mass. It's important to begin the carbup right after the depletion workout, otherwise you'll begin to catabolize muscle. Do your depletion Friday late afternoon or early evening, then begin with liquid carbs (dextrose/maltodextrin) and simple carbs later. On Saturday, change to complex carbs like brown rice, potatoes, pancakes, whole grain bread, oatmeal. On Sunday, you should be back in ketosis by lunchtime. Remember, 25-35 g carbs per day during the week. Use ketostix at the beginning. A little cardio will help on Sunday to get you back into ketosis.